Basis of Presentation - Additional Information (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2011	Aug. 31, 2010
Basis of Presentation [Line Items]
Adjustment amounts on gross basis in revenues and expenses	$ 108	$ 101	$ 311	$ 256